Results 41 to 50 of about 17,553,550 (282)

Application of environmental tracers for investigation of groundwater mean residence time and aquifer recharge in fault-influenced hydraulic drop alluvium aquifers [PDF]

open access: yesHydrology and Earth System Sciences, 2019
Investigating groundwater residence time and recharge sources is crucial for water resource management in the alluvium aquifers of arid basins. Environmental tracers (chlorofluorocarbons, 3H, 14C, δ2H, δ18O) and groundwater hydrochemical components are ...
B. Ma   +7 more
doaj   +1 more source

Determination of the residence-time distribution in industrial dryer for the production of recycled polyester [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2021
The study proposes the evaluation of the residence-time distribution (RTD) in situ in an industrial dryer for the production of recycled polyester fibers (PES) from colorless polyethylene terephthalate (PET) flakes without interruption of the production.
Zauli da Silva Felipe   +3 more
doaj   +1 more source

Does residence time affect responses of alien species richness to environmental and spatial processes? [PDF]

open access: yes, 2012
One of the most robust emerging generalisations in invasion biology is that the probability of invasion increases with the time since introduction (residence time). We analysed the spatial distribution of alien vascular plant species in a region of north-
Dainese,Matteo   +5 more
core   +1 more source

Design and Development of Mathematical Model for Static Mixer [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2016
A numerical model for simulating Residence Time Distribution (RTD) of turbulent flows in helical static mixers is proposed and developed to improve the understanding of static mixers.
Akila Rajamanickam, Krishnaswamy Balu
doaj  

Comment on mean residence time in flow systems [PDF]

open access: yesChemical Engineering Science, 1985
Critique d'un article de Awasthi et Vasudeva paru ibid., 1983, 38, 313, selon lequel le temps de sejour d'un systeme en ecoulement peut etre superieur au quotient du volume et du ...
Curl, Rane L., Mann, Uzi
openaire   +3 more sources

Numerical Simulations of a Gas–Solid Two-Phase Impinging Stream Reactor with Dynamic Inlet Flow

open access: yesEnergies, 2018
Fluid flow characteristics and particle motion behavior of an impinging stream reactor with dynamic inlet flow (both inlet velocity patterns exhibit step variation) are investigated and discussed with the computational fluid dynamics–discrete ...
Xueqing Liu   +4 more
doaj   +1 more source

Parametric Study of Residence Time Distributions and Granulation Kinetics as a Basis for Process Modeling of Twin-Screw Wet Granulation

open access: yesPharmaceutics, 2021
Twin-screw wet granulation is a crucial unit operation in shifting from pharmaceutical batch to continuous processes, but granulation kinetics as well as residence times are yet poorly understood.
Timo Plath   +3 more
doaj   +1 more source

Pre-event water contributions and streamwater residence times in different land use settings of the transboundary mesoscale Lužická Nisa catchment

open access: yesJournal of Hydrology and Hydromechanics, 2017
The objective of the study was to evaluate the spatial distribution of peakflow pre-event water contributions and streamwater residence times with emphasis on land use patterns in 38 subcatchments within the 687 km2 large mesoscale transboundary ...
Šanda Martin   +7 more
doaj   +1 more source

The residence time of water in the atmosphere revisited [PDF]

open access: yesHydrology and Earth System Sciences, 2017
This paper revisits the knowledge on the residence time of water in the atmosphere. Based on state-of-the-art data of the hydrological cycle we derive a global average residence time of 8.9 ± 0.4 days (uncertainty given as 1 standard deviation).
R. J. van der Ent, O. A. Tuinenburg
doaj   +1 more source

The distribution of range sizes of native and alien plants in four European countries and the effects of residence time [PDF]

open access: yes, 2008
Aim Do the statistical distributions of range sizes of native and alien species differ? If so, is this because of residence time effects? And can such effects indicate an average time to a maximum?
Stout, J.C.   +23 more
core   +1 more source

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